/*
 * MIT License
 *
 * Copyright (c) 2018 Alibaba Group
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.libra.expr.compiler.lex;

import com.libra.expr.common.StringSupport;

/**
 * Created by gujicheng on 16/9/8.
 */
public abstract class Parser {
    public final static int RESULT_FAILED = 0;
    public final static int RESULT_NEED_MORE = 1;
    public final static int RESULT_FINISHED_REMAIN = 2;
    public final static int RESULT_FINISHED = 3;

    protected final static int STATE_Start = 0;
    protected final static int STATE_Body = 1;

    protected int mState;
    protected StringBuilder mStrBuilder = new StringBuilder();
    protected StringSupport mStringManager;

    public Parser() {
        reset();
    }

    public void setStringManager(StringSupport sm) {
        mStringManager = sm;
    }

    public void reset() {
        mState = STATE_Start;
        mStrBuilder.setLength(0);
    }

    public abstract int addChar(char ch);
    public abstract Token getToken();
}
